JP2014067637A5 - - Google Patents
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- JP2014067637A5 JP2014067637A5 JP2012213050A JP2012213050A JP2014067637A5 JP 2014067637 A5 JP2014067637 A5 JP 2014067637A5 JP 2012213050 A JP2012213050 A JP 2012213050A JP 2012213050 A JP2012213050 A JP 2012213050A JP 2014067637 A5 JP2014067637 A5 JP 2014067637A5
- Authority
- JP
- Japan
- Prior art keywords
- carbon material
- negative electrode
- secondary battery
- nonaqueous secondary
- composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003575 carbonaceous material Substances 0.000 claims description 22
- 239000002131 composite material Substances 0.000 claims description 9
- 229910021382 natural graphite Inorganic materials 0.000 claims description 7
- 239000011149 active material Substances 0.000 claims 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 claims 1
- 229910002804 graphite Inorganic materials 0.000 claims 1
- 239000010439 graphite Substances 0.000 claims 1
- 238000005563 spheronization Methods 0.000 claims 1
- 239000007770 graphite material Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
Description
すなわち、本発明の趣旨は、等方的加圧処理された炭素材の表面の少なくとも一部に、黒鉛質物層を有する複合炭素材（ａ）と、天然黒鉛（ｂ）を少なくとも含有することを特徴とする非水系二次電池負極用炭素材に存する。
That is, the gist of the present invention is that at least a part of the surface of the carbon material subjected to isotropic pressure treatment contains at least a composite carbon material (a) having a graphite material layer and natural graphite (b). It exists in the carbon material for the non-aqueous secondary battery negative electrode characterized by the above.
本発明の等方的加圧処理された炭素材の表面の少なくとも一部に、黒鉛質物層を有する複合炭素材（ａ）と、天然黒鉛（ｂ）を少なくとも含有する炭素材は、それを非水系二次電池用負極材として用いることにより、プレス時により低タップ密度の天然黒鉛（ｂ）が選択的に変形するために複合炭素材（ａ）の変形、破壊による新たな反応面の生成を抑制することが可能となる。その結果、電解液との反応が抑制され高い初期容量を得ることができ、また、発生ガス量も抑制できる。さらに高配向比な複合炭素材量（ａ）と天然黒鉛（ｂ）をブレンドすることにより電極の膨張を抑制でき高いサイクル維持率を有する非水系二次電池を得ることができると考えられる。 The composite carbon material (a) having a graphite material layer on at least a part of the surface of the isotropically pressurized carbon material of the present invention and the carbon material containing at least natural graphite (b) By using it as a negative electrode material for an aqueous secondary battery, the natural graphite (b) having a low tap density is selectively deformed by pressing, so that a new reaction surface is generated by deformation and destruction of the composite carbon material (a). It becomes possible to suppress. As a result, the reaction with the electrolytic solution is suppressed, a high initial capacity can be obtained, and the amount of gas generated can be suppressed. Further, it is considered that a non-aqueous secondary battery having a high cycle retention rate can be obtained by blending the composite carbon material amount (a) having a high orientation ratio and natural graphite (b) to suppress the expansion of the electrode.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012213050A JP6127426B2 (en) | 2012-09-26 | 2012-09-26 | Non-aqueous secondary battery carbon material, negative electrode, and non-aqueous secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012213050A JP6127426B2 (en) | 2012-09-26 | 2012-09-26 | Non-aqueous secondary battery carbon material, negative electrode, and non-aqueous secondary battery |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2014067637A JP2014067637A (en) | 2014-04-17 |
| JP2014067637A5 true JP2014067637A5 (en) | 2015-10-08 |
| JP6127426B2 JP6127426B2 (en) | 2017-05-17 |
Family
ID=50743824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012213050A Active JP6127426B2 (en) | 2012-09-26 | 2012-09-26 | Non-aqueous secondary battery carbon material, negative electrode, and non-aqueous secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6127426B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2905717C (en) * | 2014-09-09 | 2019-10-15 | Shoji Hasegawa | Graphene composite and method of producing the same |
| GB2530631B (en) * | 2014-09-09 | 2017-04-12 | Graphene Platform Corp | A method of producing a composite conductive material |
| JP5777195B1 (en) * | 2014-09-09 | 2015-09-09 | グラフェンプラットフォーム株式会社 | COMPOSITE CONDUCTIVE MATERIAL, ELECTRIC STORAGE DEVICE, CONDUCTIVE DISPERSION, CONDUCTIVE DEVICE, CONDUCTIVE COMPOSITE AND HEAT CONDUCTIVE COMPOSITE AND METHOD FOR PRODUCING COMPOSITE CONDUCTIVE MATERIAL |
| JP5688669B1 (en) * | 2014-09-09 | 2015-03-25 | グラフェンプラットフォーム株式会社 | Graphite-based carbon material used as graphene precursor, graphene dispersion containing the same, graphene composite, and method for producing the same |
| US9552900B2 (en) | 2014-09-09 | 2017-01-24 | Graphene Platform Corporation | Composite conductive material, power storage device, conductive dispersion, conductive device, conductive composite and thermally conductive composite |
| US9598593B2 (en) | 2015-02-27 | 2017-03-21 | Graphene Platform Corporation | Graphene composite and method of producing the same |
| CA2990347A1 (en) * | 2015-10-21 | 2017-04-27 | Imerys Graphite & Carbon Switzerland Ltd. | Carbonaceous composite materials with snowball-like morphology |
| CN106629702A (en) * | 2016-12-21 | 2017-05-10 | 上海杉杉科技有限公司 | Processing method of high cyclic natural graphite negative electrode material |
| WO2019186831A1 (en) * | 2018-03-28 | 2019-10-03 | 日立化成株式会社 | Method for manufacturing negative electrode material for lithium-ion secondary battery, and method for manufacturing lithium-ion secondary battery |
| WO2024108558A1 (en) * | 2022-11-25 | 2024-05-30 | 宁德时代新能源科技股份有限公司 | Secondary battery and electric device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4499498B2 (en) * | 2003-07-16 | 2010-07-07 | 関西熱化学株式会社 | Negative electrode material for lithium ion secondary battery, method for producing the same, negative electrode for lithium ion secondary battery and lithium ion secondary battery using the negative electrode material |
| KR101281186B1 (en) * | 2005-12-14 | 2013-07-02 | 니혼코크스코교 가부시키가이샤 | Graphite particle, carbon-graphite composite particle and their production process |
| JP5407196B2 (en) * | 2008-06-27 | 2014-02-05 | 三菱化学株式会社 | Non-aqueous secondary battery composite graphite particles, negative electrode material containing the same, negative electrode and non-aqueous secondary battery |
-
2012
- 2012-09-26 JP JP2012213050A patent/JP6127426B2/en active Active
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